Abdominal exercise machine



FIG. 1 is a front perspective view of the abdominal exercise machineshowing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a side elevation view thereof.

CLAIM The ornamental design for an abdominal exercise machine, as shownand described.